West Trehill is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 19 October 1987. Farmhouse.

West Trehill

WRENN ID
old-latch-rye
Grade
II
Local Planning Authority
Cornwall
Constituency
South East Cornwall MP: Anna Gelderd (Lab)
Country
England
Date first listed
19 October 1987
Type
Farmhouse
Address
West Trehill, Calstock
OS grid reference
SX 418 694
Coordinates
50.50346, -4.23094
Source
Historic England listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

West Trehill is a farmhouse, now a house, dating from the mid 19th century, with few later alterations. It is built of slatestone rubble, partly rendered and partly slate-hung, and has a slate roof with ridge tiles and gable ends. The building features gable end stacks with rendered shafts. The layout consists of a two-room plan, with a large room on the left, a central door leading to an entrance hall, and a small room on the right that has a stair at the rear. To the rear right, there is an integral service wing also with a two-room plan, where the room at the end is heated by a gable end stack.

The exterior is two storeys high with a symmetrical three-window front that is slate-hung. All windows are mid 19th century plate-glass sashes with margin glazing. The central entrance has panelled double doors with a pitched slate hood and an inner half-glazed margin glazed door. The right side of the building is rendered, while the right gable end is blind. The rear wing on the right is two storeys tall, featuring a 20th-century door and two 20th-century casements on the ground and first floors. The gable end stack has a brick shaft with a curved oven at the base, and there is a door to the right of the stack along with a 20th-century window at first floor level. The left side of the main range has a blind gable end and a two-storey lean-to at the rear with 20th-century casements on both floors. The interior has not been inspected.

Local climate

West Trehill sits in a wetter-than-average part of the UK, with an average of 1,000 mm of rain a year. This makes it wetter than 80% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 81% of listed buildings.

It experiences an average of 17 freeze-thaw cycles a year, fewer than 84% of listed buildings. Of these, 7 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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